Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 506 [Rate centres in NPA 506] [Dial plan for NPA 506]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date

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Last updated: Fri, 10 Jul 2026 02:55:48 UTC

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